I have a Latitude E6410, the screen was working than out of nowhere vertical lines/streaks appeared. The lines/streaks are present in both bios and bios diagnostics so a software problem probably isn't the issue. The lines/streaks aren't distinct as in their not a solid color like a black or red line, their more like faint color/brightness variations that form lines are slightly brighter/darker than normal and very in width. Hooked up a external monitor and the lines aren't present, also the lines aren't present when the screen/image is white or black(still present if light black/gray).